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Re:两人可以合作洗是什么意思?

Posted by frkstyc at 2007-04-01 12:54:55 on Problem 3211
In Reply To:两人可以合作洗是什么意思? Posted by:cnhawk at 2007-04-01 12:51:54

yes, it can be done in 6 units of time. say, one person will wash the piece that requires 6 units of time, the other person will wash the rest

> 比如三件衣服,2,4,6
> 花费时间可以为6么?  6 = 2+4  or 先洗4,6,然后洗2?

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thanks~~ (150) cnhawk 2007-04-01 12:57:51

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